<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>
<!--view层 模版-->
<div id="app">
    <span v-bind:title="message">
        悬停
        {{message}}
    </span>
</div>
<div id="two">
        <span>
            <h1 v-if="type==='A'">A</h1>
            <h1 v-else-if="type==='B'">B</h1>
            <h1 v-else>C</h1>
        </span>
</div>
<!--导入vue.js-->
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.min.js"></script>
<script>
    var vm=new Vue({
        el: "#app",
        <!--model:数据-->
        data: {
            message: "hello,vue!"
        }
    });
    var vm01=new Vue({
       el: "#two",
        data: {
           type: 'A'
        }
    });
</script>
</body>
</html>